Add a test for KeywordExtensionsDelegateImpl::IsEnabledExtension().

chrome/browser/autocomplete/keyword_extensions_delegate_impl.cc

Index: chrome/browser/autocomplete/keyword_extensions_delegate_impl.cc
diff --git a/chrome/browser/autocomplete/keyword_extensions_delegate_impl.cc b/chrome/browser/autocomplete/keyword_extensions_delegate_impl.cc
index bc647ea01eda6f542bf68420b0849d0a54c63adb..3af9ed9e105a71ce04c1f1efc8d039fb66884e5e 100644
--- a/chrome/browser/autocomplete/keyword_extensions_delegate_impl.cc
+++ b/chrome/browser/autocomplete/keyword_extensions_delegate_impl.cc
@@ -11,7 +11,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
-#include "extensions/browser/extension_system.h"
+#include "extensions/browser/extension_registry.h"
 #include "extensions/browser/notification_types.h"
 
 namespace omnibox_api = extensions::api::omnibox;
@@ -51,13 +51,12 @@ void  KeywordExtensionsDelegateImpl::IncrementInputId() {
 
 bool KeywordExtensionsDelegateImpl::IsEnabledExtension(
     const std::string& extension_id) {
-  ExtensionService* extension_service =
-      extensions::ExtensionSystem::Get(profile_)->extension_service();
   const extensions::Extension* extension =
-      extension_service->GetExtensionById(extension_id, false);
+      extensions::ExtensionRegistry::Get(

[Yoyo Zhou, 2014/09/05 19:50:54]

right, I should have noticed this.

+          profile_)->enabled_extensions().GetByID(extension_id);
   return extension &&
       (!profile_->IsOffTheRecord() ||
-       !extensions::util::IsIncognitoEnabled(extension_id, profile_));
+       extensions::util::IsIncognitoEnabled(extension_id, profile_));
 }
 
 bool KeywordExtensionsDelegateImpl::Start(